make video loop

Author: jyavenard

tests/ManagedMediaSource/bipbop.html

@@ -50,6 +50,7 @@ <h3>Appending .mp4 video chunks using the Managed Media Source API</h3>
 
     // Or explicitly disable the Remote Playback API
     video.disableRemotePlayback = true;
+    video.loop = true;
 
     testFunction(source, video);
   };